Auxiliary-air-supply device



Oct. 27,1925

W. L. GRAVES AUXILIARY AIR SUPPLY DEVICE;

Filed Jan. 2, 1925 la I...

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Patented Oct. 27, 1925.

UNITED STAT-Es WALTER I.. canvas, or Harmsen mssacuusurms.

Application fi1edjanuary 2, 1925. Serial No. 275.

T allaiter@ t may wave/m i Be it known that I, WALTER L. Gnnvns, a

vcitizen of the United States, residingy at Hatfield, in the/"county ofHampshire and State of Massachusetts, have invented newv and usefulImprovements in AuxiliaryAir- Supply Devices, of which the following isa specification.

This invention relates to auxiliary air inlet devices especially adaptedfor use on internal combustion engines.

Briey stated, an important object of 'this invention is to provide anauxiliary air inlet device consisting of a pair of spaced screensbetween `which the auxiliary air supply is admitted in suoli a mannerthat the same is thoroughly mixed with 'the fuel charge from thecarbureter.

A further and equally important aim of the invention is to provide anauxiliary air inlet device having simple means whereby the auxiliary airsupply may be controlled and cut off if desired.

Also an important aim is to provide an auxiliary air inlet device whichis of highly simplified construction, simple to apply, and cheap tomanufacture.

Other objects and advantages will be apparent during the course of thefollowing description.

In the accompanying drawing forming a part of this application and inwhich like numerals are employed to designate Vlike parts throughout thesame,

Figure 1 is a side elevation of the improved auxiliary air inlet deviceapplied;

Fig. 2 is a perspective of the same detached;

Fig. '3 is a vertical transverse sectional view through 'the device.

1n the drawing, wherein for the purpose of illustration is shown alpreferred embodiment of the invention, the numeral 5 designates a bodyof fibre or other slightly comressible material adapted to be arrangedetween the fianges of an intake manifold 8 and a carbureter 9.Particular attention is directed to the fact that the fibrous body 5does not require separate gaskets between itself and the flanges of themanifold and the carbureter.` This is so because the fibrous body cancompress slightly to bring about a fluid tight connection. Asillustrated in Fig. 2 the fibrous body is provided witha centrallyarranged opening, the opposite ends of which are provided with screencloth 6. The edges of; the screencloth are extended inwardly andfarecemented brotherwisefi-rmly secured" to the'iwa'lli'of dpening infthebdy andg `this provides a "cirrn paratively smooth exterior btl-i' sidesof the fibrous hdy.` The 1fuel mixture in passing through the firstscreen it encounters will be finely `broken up and mixed with a quantityof air which is admitted to the opening in the fibrous body by an airinlet member 10. The air admitted by way of the inlet member 10 readilymixes with the finely mixed and divided fuel charge and the resultingmixture is passed through the second screen and is finely vaporized sothat a highly combustible mixture is produced. The presence of thespaced reticulated members 6 in the path of travel of the fuel chargearre'sts the progress of the heavier and more or less unvaporized fuelso that this is mixed with the air entering from the conduit 10 and thusa 'substantial saving in liquid fuel is brought about.

The air admitted by way of the inlet member 10 contacts with aconcavo-convex spray head and valve 14 having a stem 16 movable throughthe member 10. When the auxiliary air supply contacts with the 'more orless mushroom shaped head 14 it is deflected and spread over -acomparatively wide area. to mix with the liquid fuel laden air. The head14 may be engaged by an adjusting screw 18 threaded through the brousbody and having a head 20. By the adjustment of they screw bolt 18 theposition of the head 14 may be varied and if desired the head may bemoved to closed position to cut off the supply of auxiliary air.

Fig. 3 illustrates that the air inlet tube 10 extends above the bottomwall of the opening in the fibrous body 5 and, |therefore, prevents theescape of anyliquid fuel which may settle in themanifold as a result ofan over-rich mixture or the choking of the engine.

Having thus described the invention, what is claimed is:

1. An auxiliary air sup ly device comprising a slightly compresslblefibrous body having an opening, reticulated members Aarranged atopposite ends of said opening and secured to the walls of the same, anair inlet tube extending into said openlng and terminating above thebottom wall of the same, a combined valve and spray head ofconcavo-oonvex formation arranged at the outlet' end of said tube andadapted to spread the auxiliary air supply, and a screw bolt threadedthrough said fibrous body and adapted to engage 'said head to limit theopening of the same or kholdthe same in closed position.

2. .An auxiliary air supply device oomprising a slightly oompressiblefibrous body having an opening, reticulated. members arranged atopposite ends of said opening and secured to the walls of the same, anair inlet tube extending into said opening and terminating above thebottom Wall 0f the same, a combined valve and 'spray head ofeoneavo-convex formation arranged at the outlet end of said tube Aandadapted to spread the auxiliary air supply, and a Screw bolt threadedthrough said librous body and adapted to engage said head to limit theopening of the same or hold the same in closed position, said tube andsaid head being arranged between said retioulated members.

In testimony whereof I ailix my signature.

VALTER L. GRAVES.

